diff --git a/docker/astroport/Dockerfile b/docker/astroport/Dockerfile
index 653080b7..b9e901ea 100644
--- a/docker/astroport/Dockerfile
+++ b/docker/astroport/Dockerfile
@@ -121,7 +121,7 @@ RUN chmod +rx /usr/local/bin/cronlock
 
 # config ssmtp
 COPY templates/.ssmtprc /etc/ssmtp/ssmtp.conf
-RUN chmod 600 /etc/ssmtp/ssmtp.conf
+RUN chmod 640 /etc/ssmtp/ssmtp.conf && chgrp mail /etc/ssmtp/ssmtp.conf
 
 EXPOSE 1234 12345
 
diff --git a/install.sh b/install.sh
index 0252f05a..07d50d7b 100755
--- a/install.sh
+++ b/install.sh
@@ -99,7 +99,8 @@ echo "## INSTALLATION AstroGEEK OpenCV = 'Intelligence Amie' - DEV - "
 
 ## MAILJET SSMTP RELAYING : ADD YOUR CREDENTIALS
 sudo cp ~/.zen/Astroport.ONE/templates/.ssmtprc /etc/ssmtp/ssmtp.conf
-sudo chmod 600 /etc/ssmtp/ssmtp.conf
+sudo chmod 640 /etc/ssmtp/ssmtp.conf
+sudo chgrp mail /etc/ssmtp/ssmtp.conf
 
 echo "$USER:support@g1sms.fr:mail.asycn.io:587" | (sudo su -c 'tee -a /etc/ssmtp/revaliases')